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Globally, マサキ (マサキ , Masaki ) is quite a rare principally boy's, but very infrequently female forename. The first name マサキ is characteristic of Japan, where it is quite a rare masculine name, Tanzania, where it is a rare boy's name, and Brazil. Measured by absolute frequency, it is the most numerous in Japan, China, and Brazil. More prevalently, マサキ is the last name as well as the forename.
マサキ is also a name for the fictitious and mythical characters: Masaki Uehara , the Ao-chan Can't Study!'s character and Masaki Mayuka , character in Tenchi Muyo!.